中国电机工程学报2017，Vol.37Issue(20)：6050-6058,9.DOI:10.13334/j.0258-8013.pcsee.161164
基于相位延迟的三电平Boost变换器中点电位平衡控制策略
A Midpoint Potential Balance Control Strategy Based on Pulse Phase Delays of Three-level Boost Converter
摘要
Abstract
In order to solve the problem of inherent midpoint potential shift of three-level boost converter,the accurate model of output voltage and deviation voltage were built by introducing an inductor current ripple-based modeling approach.The piecewise expressions of deviation voltage gains were derived,depending on pulse phase delays in different duty ratios.A control scheme with two different bandwidths bicyclic was designed,and the bias voltage enable module and the oscillation suppression module were introduced.Series compensation with PID and PI controller were adopted to improve the dynamic performance of the output voltage loop and eliminate the static error of deviation voltage loop.The correctness of the theoretical analysis and effectiveness of the proposed control strategy were both verified by simulation and experimental results.关键词
三电平变换器/Boost变换器/偏差电压/相位延迟/中点电位平衡Key words
three-level converter/Boost converter/deviation voltage/phase delay/midpoint potential balance分类
信息技术与安全科学引用本文复制引用
张钢,杜会卿,陈艺铭,刘志刚..基于相位延迟的三电平Boost变换器中点电位平衡控制策略[J].中国电机工程学报,2017,37(20):6050-6058,9.基金项目
国家重点研发计划项目(2016YFB1200504).Supported by National Key Research and Development Project(2016YFB1200504). （2016YFB1200504）
